Order flow is toxic when it adversely selects market makers, who may be unaware they are
providing liquidity at a loss. We present a new procedure to estimate flow toxicity based on …

Virtually all journal articles in the factor investing literature make associational claims, in denial
of the causal content of factor models. Authors do not identify the causal graph consistent …

… The diameter of the zone of inhibition was measured in millimeters (mm). The tests were
performed in triplicate. The results were expressed as the average ± standard deviation (SD). …

… On 28 April, the Spanish De-escalation Plan was announced, consisting of four phases in
which the national lockdown was gradually reduced. Finally, the state of alarm ended on 21 …

… Alexander Lipton and Marcos López de Prado, Abu Dhabi Investment Authority … we wish to
emphasise the dimension, and 0m,n the null matrix in Mm,n (F). Recall that a matrix A ∈ Mn (F…

… endpoint) was 1.87 ± 0.5 mm, late lumen loss was 0.23 ± 0.4 mm, and restenosis rate was
… (1.88 ± 0.6 mm; p = NS) but smaller than that achieved after EES (2.16 ± 0.7 mm; p < 0.001). …

… in methanol (Pestanal grade, Riedel de Haën, Spain) or water. … Diluted solutions were prepared
daily from de stock solutions… The body of the CPE was a PTFE tube (3.0 mm id) filled with …

Background— A catheter-based approach after fibrinolysis is recommended if fibrinolysis is
likely to be successful in patients with acute ST-elevation myocardial infarction. We designed …

Background— The effect of β-blockers on infarct size when used in conjunction with primary
percutaneous coronary intervention is unknown. We hypothesize that metoprolol reduces …

… de la demanda asistencial ha tenido lugar un incremento muy importante en el número de
centros dotados de UHCI y en la necesidad de … debe ser equivalente a 0,5 mm de plomo. …